EP 1471094 B1 20100630 - Coextruded, heat-sealable and peelable polyesterfoil; method of preparation and use.
Title (en)
Coextruded, heat-sealable and peelable polyesterfoil; method of preparation and use.
Title (de)
Coextrudierte, heisssiegelbare und peelfähige Polyesterfolie, Verfahren zu ihrer Herstellung und ihre Verwendung
Title (fr)
Feuille thermoscellable et pelable de polyester coextrudé; méthode de fabrication et usage.
Publication
Application
Priority
DE 10318100 A 20030422
Abstract (en)
[origin: EP1471094A1] Coextruded, transparent polyester film with a heat-sealable and peelable outer layer (A) of polyester containing particles with a d50 of 2.5-12.0 microns, in which the polyester comprises 12-89 mol% aromatic dicarboxylic acid units and 11-88 mol% aliphatic diacid units, the ratio of d50 and thickness (dA) of layer (A) is 1.0 or more, and dA is 2.3-10.0 microns. Coextruded, transparent, biaxially-oriented polyester film with a base layer (B) and a heat-sealable and peelable (at least on CPET) outer layer (A) comprising (a) 80-98 wt% polyester and (b) 2-10 wt% inorganic and/or organic particles with an average diameter (d50) of 2.5-12.0 microns, in which (c) the polyester comprises 12-89 mol% aromatic dicarboxylic acid units and 11-88 mol% aliphatic dicarboxylic acid units, (d) the ratio of d50 and the thickness (dA) of layer (A) is 1.0 or more and (e) dA = 2.3-10.0 microns. An independent claim is also included for a method for the production of this film by feeding the polymers for layers (B) and (A) and optionally outer layer (C) into separate extruders, passing the melts through a multi-layer die to form flat, coextruded melt film, drawing off and solidifying the multilayer film over a cooling roller and optionally other rollers, stretching first in the machine direction (MD) at 60-130[deg]C (by a ratio of (2:1)-(5.5:1)) and then in the cross direction (TD) at 90-140[deg]C (by a ratio of (2.4:1)-(5.0:1)), and then heat fixing.
IPC 8 full level
B29C 55/12 (2006.01); B32B 27/36 (2006.01); B65D 53/04 (2006.01); B65D 81/34 (2006.01); C08J 5/00 (2006.01); C08J 5/18 (2006.01); C08L 67/02 (2006.01); B29K 67/00 (2006.01); B29L 9/00 (2006.01)
CPC (source: EP KR US)
B32B 27/08 (2013.01 - US); B32B 27/36 (2013.01 - EP US); B32B 37/153 (2013.01 - US); C08J 5/18 (2013.01 - EP KR US); C08L 67/02 (2013.01 - EP US); B32B 2307/31 (2013.01 - US); B32B 2307/412 (2013.01 - US); B32B 2307/518 (2013.01 - US); C08J 2367/02 (2013.01 - EP US); C08L 2205/02 (2013.01 - EP US); Y10T 428/2486 (2015.01 - EP US); Y10T 428/2839 (2015.01 - EP US); Y10T 428/31909 (2015.04 - EP US)
Designated contracting state (EPC)
DE FR GB IT LU
DOCDB simple family (publication)
EP 1471094 A1 20041027; EP 1471094 B1 20100630; DE 10318100 A1 20041111; DE 502004011323 D1 20100812; JP 2004322646 A 20041118; KR 20040091576 A 20041028; US 2004213968 A1 20041028
DOCDB simple family (application)
EP 04008946 A 20040415; DE 10318100 A 20030422; DE 502004011323 T 20040415; JP 2004127211 A 20040422; KR 20040027242 A 20040420; US 64515503 A 20030821